208 results about "Biological filter" patented technology

The utility model relates to the technical field of sewage treatment equipment, in particular to an electrolytic biological filter system for rapid treatment of overflow pollution, which comprises a bioelectrochemical system and a biological aerated filter system, the bioelectrochemical system comprises a tank body I, a biological anode and a biological cathode are arranged in the tank body I, and the biological anode and the biological cathode are arranged in the tank body II. The biological anode and the biological cathode are connected to a power supply, the biological aerated filter system comprises a tank body II, sewage treated by the tank body I enters the tank body II, an aeration device, a filtering device and a clear water outlet device are arranged in the tank body II, and the biological electrochemical system is coupled with the biological aerated filter through the aeration device, the filtering device and the clear water outlet device. The electrolytic biological filter system for rapidly treating overflow pollution is formed, the rapid electron transfer characteristic of a bioelectrochemical system is fully utilized, the denitrification rate of the biological aerated filter is increased, the treatment time can be greatly shortened under the same denitrification requirement, and the effect of rapidly treating overflow pollution in emergency is achieved.

The invention relates to the technical field of wastewater treatment, and provides a papermaking wastewater precipitation and recovery device which comprises air flotation equipment and a filter tank, and further comprises a filter cartridge, a wastewater pipe, a backwashing recovery assembly, a biological filter tank and a biological filter assembly, the two ends of the filter cartridge are sealed and rotationally sleeved with bearing supports respectively, and the two bearing supports are symmetrically arranged; a mounting rack is mounted on the filter tank, a bearing bracket is fixedly mounted in the mounting rack, a wastewater pipe is fixedly mounted on the mounting rack, a backwashing recovery assembly is mounted in the filter cartridge, a water distribution tank, a filter area and an overflow area are arranged in the biological filter tank, and a biological filter assembly is mounted in the biological filter tank. The problems that in the prior art, fine fibers, colloids and mixed impurities in waste water are prone to blocking a filtering structure, the waste water treatment process is discontinuous, frequent shutdown is needed for cleaning the filtering structure, and the overall treatment efficiency and stability are low are solved.

The invention belongs to the technical field of environmental governance, and particularly relates to a waste gas treatment system, application thereof and a treatment method for malodorous gas generated by a household garbage landfill. The waste gas treatment system provided by the invention comprises an alkali washing spray tower, a biological filter bed of which a bottom first gas inlet is communicated with a top outlet of the alkali washing spray tower, a deodorization spray tower of which a bottom gas second inlet is communicated with a top outlet of the biological filter bed, and an emptying pipe communicated with a top outlet of the deodorization spray tower. When the waste gas treatment system is used for treating malodorous gas, the malodorous gas can be subjected to three-step purification treatment of primary gas-liquid mass transfer, microbial degradation and secondary gas-liquid mass transfer, various harmful substances in the waste gas can be efficiently removed, meanwhile, the system is not prone to leakage, continuous treatment can be achieved, and the waste gas treatment efficiency is improved. And the secondary pollution is reduced while the treatment effect is ensured.

The invention relates to the technical field of water treatment, and discloses a multi-stage linkage water quality purification treatment method for drainage basin treatment, which comprises the following steps: reducing the flow rate of drainage basin runoff entering a pretreatment pool by using a stepped energy dissipation ridge; an overflow weir is arranged between the pretreatment pool and the biochemical purification unit, runoff with the flow lower than a threshold value is guided to the biochemical purification unit according to a water level pressure head, and excessive flow is guided to a bank zone ecological buffer zone; enabling the runoff to sequentially flow through the anaerobic biological filter tank and the aerobic ecological tank, and generating gravity flow by utilizing a unit elevation difference; according to the invention, the self-adaptive flow distribution is realized by utilizing a water level physical signal, the scouring stripping of a microbial film of a biochemical unit by a dynamic load is effectively prevented, and the stability of the effluent quality of the system is maintained through kinetic energy level conversion.

The invention discloses integrated aquaculture tail water treatment equipment and method, and belongs to the technical field of aquaculture tail water treatment. The interior of the box body is divided into a plurality of units by partition plates, and a primary filtering self-cleaning unit, a secondary filtering and disinfecting unit, a composite biological membrane treatment unit, a deep physical-biological filtering unit and a modular composite adsorption unit are sequentially arranged in the flowing direction of a water body; the primary filtering self-cleaning unit is used for primarily filtering tail water; the secondary filtering and disinfecting unit is used for disinfecting and further filtering the water body; the composite biological membrane treatment unit is used for treating a water body by utilizing a nitrification-denitrification composite microbial membrane; the deep physical-biological filtering unit is used for treating a water body by utilizing a rattan cotton filtering medium which is stacked in a multi-layer manner; the modularized composite adsorption unit is used for adsorbing a water body. The system has the advantages of high integration, intelligent self-control, convenient maintenance, stable operation and the like.

The utility model relates to sewage treatment technical field proposes a kind of biological deodorization device for sewage treatment station, filtering mechanism, filtering mechanism includes first mounting bracket, and electric push rod is installed on first mounting bracket, and the output end of electric push rod is connected with installation frame, and filter screen is installed on installation frame;Cleaning mechanism, cleaning mechanism includes second mounting bracket, and multiple brushes are connected on second mounting bracket, and the bottom end of second box body is installed with first motor, and the output end of first motor is connected with second mounting bracket;Fan is installed to the top end of second box body, and the input end of fan is communicated with second box body, and the output end of fan is communicated with first box body, the device is rotated by second motor drive installation ring, to adjust the position of first biological filter bed and second biological filter bed, reduce replacement step, improve use convenience, by first motor drive multiple brushes rotation, to carry out cleaning to particulate matter on filter screen, improve filtration effect.

The utility model discloses a multistage deodorization device of a biological filter, which relates to the technical field of waste gas treatment and comprises a treatment tank, the filter box is arranged on the outer surface of the treatment tank and is used for filtering; the sealing cover is arranged on the upper surface of the treatment tank; the heating unit is arranged in the treatment tank and is used for heating; the stirring unit is arranged in the treatment pond and used for stirring, the inner wall of the treatment pond is fixedly connected with a partition plate, and the interior of the filter box is detachably connected with a multi-stage filter screen plate. According to the utility model, the heating box, the circulating pump, the connecting pipe, the circulating heating pipe and the temperature controller are matched with one another to perform auxiliary heating on the interior of the treatment tank, so that microorganisms in the biological reaction tank are facilitated to decompose waste liquid; the waste liquid in the treatment pond can be conveniently and slowly stirred by adopting the mutual cooperation of the treatment pond, the filter box, the hydraulic cylinder, the limiting sliding rod, the moving plate, the connecting plate, the limiting block and the stirring roller, so that the decomposition efficiency of deodorization can be improved.

The invention discloses a river crab-snail breeding method based on space-time isolation and micro-flowing water circulation, and relates to the technical field of aquaculture, the key points of the technical scheme are that an isolation barrier is arranged in a river crab breeding pond, the river crab breeding pond is divided into a snail breeding area and a river crab main breeding area, and a water passing structure is arranged on the isolation barrier; a three-dimensional inhabiting base frame is arranged in the snail breeding area; generating directional water flow by utilizing oxygenation equipment to drive water in the main river crab breeding area to flow back after being filtered and purified by the snail breeding area; seed snails are put into the snail breeding area, and the snails grow and breed by feeding nutrient substances in the water body of the main river crab breeding area; collecting finished snails from the snail breeding area regularly and transferring the finished snails to the main river crab breeding area for feeding of the river crabs; in the river crab fattening period, the snail breeding area is opened, and the river crabs are allowed to freely eat the remaining snails. By means of the method, it can be guaranteed that snail populations rapidly breed to form a high-density biological filter bed, high-quality active protein bait can be provided for river crabs, and the win-win situation of water purification and feed cost reduction is achieved.

The invention discloses a double-sludge and double-circulation membrane biological sewage treatment device and a double-sludge and double-circulation membrane biological sewage treatment method. Comprising an anaerobic zone, an anoxic zone, an aerobic zone and an MBR (Membrane Bioreactor) pre-anoxic zone which are arranged in sequence, and further comprises a cylindrical shell and a treatment tank at the center of the shell, a rotary gallery is arranged in the shell on one side of the treatment tank; a snakelike coiled gallery is arranged in the shell on the other side of the treatment tank; the anaerobic zone is arranged in the rotary gallery; the anoxic zone and the aerobic zone are jointly arranged in a snakelike coiled corridor, and the aerobic zone is divided into four continuous sections, namely a first aerobic zone, a second aerobic zone, a third aerobic zone and an aerobic nitrification zone; sewage is lifted by a through-wall pump to enter an MBR pre-anoxic zone, and the MBR pre-anoxic zone is divided into an upper section and a lower section; a cylindrical membrane biofilter is arranged in the MBR filtering area; and the cylindrical membrane biofilter is driven by a variable frequency motor to rotate. By arranging the double-circulation galleries, the circulation multiples of the anaerobic zone and the anoxic and aerobic zone can be controlled respectively, and the target removal rate of pollutants is achieved.

The application provides a biological denitrification treatment method for low-carbon-nitrogen-ratio wastewater, and utilizes single-stage nitrification and denitrification to treat ammonia-nitrogen wastewater in a one-piece submerged biological filter (SBAF reactor). The method comprises the following steps: sludge inoculation, sludge biofilm formation, system starting, and stable operation. In the sludge inoculation, sludge meeting the microbial community distribution is selected. In the system starting process, the microbial community distribution in the sludge in the one-piece submerged biological filter (SBAF reactor) is used as the symbol of successful system starting. During the input of the high-concentration ammonia-nitrogen wastewater to be treated, the aerobic nitrifying bacteria and the anaerobic denitrifying bacteria can more stably meet the above microbial community distribution, the system has better stability, the stable operation time is longer, the sludge does not need to be replaced for restarting during the stable operation, the continuous operation time is longer, can reach at least 250 days or more, and the frequency of replacing the sludge for restarting is reduced.

The application discloses a microorganism-loaded activated carbon composition, a nitrile-containing wastewater pretreatment process and device and the device, and belongs to the technical field of microorganism culture and wastewater treatment device. In view of the technical problems that the electric conduction capacity and biodegradation efficiency of biological filler are poor when an electric catalysis internal circulation aeration biological filter is used for pretreatment of nitrile-containing wastewater in the prior art, and only the biodegradability of wastewater is improved, and the organic nitrile cannot be converted into available substrate, the application provides a microorganism-loaded activated carbon composition, which comprises activated carbon loaded with Shewanella oneidensis or Rhodococcus globerulus at a mass ratio of 1:2 to 1:3, and the amount of the activated carbon loaded with Shewanella oneidensis or Rhodococcus globerulus is 10 9 ~ 10 10 CFU / g, and the composition has good electric conduction capacity and biodegradation efficiency. The application further provides a nitrile-containing wastewater pretreatment process and device, which comprises the following steps: introducing nitrile-containing wastewater into the device body, and sequentially using electric treatment and a micro-nano bubble generator for treatment, and has the advantages of low power consumption, low treatment cost, convenient and safe operation, green and environment-friendly process and the like.

The utility model discloses a biological filter for sewage treatment, and relates to the technical field of sewage treatment, the biological filter comprises a treatment chamber, an aeration assembly and a decontamination assembly, a biological filter layer is arranged at the upper part in the treatment chamber, the aeration assembly is arranged at the lower part in the treatment chamber, a motor mounting frame is fixed at one side in the treatment chamber, and the motor mounting frame is fixed at the other side in the treatment chamber. And a linear motor is slidably mounted in the motor mounting frame, a dirt removal assembly is mounted below the linear motor and comprises a fixing rod, a dirt removal scraper, a connecting rod, a lantern ring and an annular scraper, and the dirt removal scraper is connected to the bottom of the fixing rod. According to the biological filter for sewage treatment, a sewage cleaning scraper of the sewage cleaning assembly can move to clean sludge on the bottom surface of the treatment chamber, the sludge is intensively pushed to one side of a sewage discharge pipe so as to facilitate timely sewage discharge, and meanwhile, the movement of the sewage cleaning scraper can drive a connecting rod and a lantern ring to synchronously move; and the annular scrapers on the two sides of the lantern ring can descale the surface of the aeration pipe.

The invention relates to the technical field of water treatment, in particular to a composite treating agent for municipal sewage and a preparation method thereof.The composite treating agent is prepared by selecting industrial solid waste boric sludge, fly ash and the like as raw materials, taking biomass raw material epoxidized soybean oil as a binder, taking biomass raw material starch and plant-based porous carbon as adsorbents, mixing the raw materials with sodium silicate and water for granulation, and preparing the composite treating agent. The baking-free composite treating agent integrating multiple functions of sulfur autotrophic denitrification nitrogen removal, phosphorus removal, heavy metal chelating, porous carbon adsorption and the like is prepared, and when the baking-free composite treating agent is applied to urban sewage treatment, synchronous low-carbon and high-efficiency removal of various pollutants such as nitrogen, phosphorus and heavy metal can be achieved; after being granulated and formed, the composite treatment agent can be used as a filler of a biological filter to support the growth of sulfur autotrophic denitrifying bacteria, and can also be directly added into a pretreatment unit or an advanced treatment unit of a sewage treatment system.

The utility model discloses a device for on-line replacement of a spraying system in a biological filter, which comprises a sewage pipe, a spraying pipe and a spraying head, a water pipe bayonet is arranged on the sewage pipe, a clamping component matched with the water pipe bayonet is arranged at the joint of the sewage pipe and the spraying pipe, and the spraying head is arranged on the spraying pipe. A water retaining cap matched with the clamping assembly is installed at the bottom of the water pipe bayonet, a filtering box is installed at the joint of the spraying pipe and the spraying head, and a filtering assembly is installed in the filtering box. Compared with the prior art, the spraying device has the beneficial effects that the clamping assembly which is convenient to disassemble is arranged between the spraying pipe and the sewage pipe and is matched with the filtering assembly which is convenient to replace and is arranged above the spraying head, so that the replacing and cleaning efficiency of the spraying assembly is improved, the operation procedures are reduced, and the spraying assembly is convenient to disassemble and replace quickly.

The utility model relates to circulating water aquaculture filtration technical field discloses a kind of three-dimensional filter devices of circulating water aquaculture, including coarse filter box, the coarse filter box inside is provided with coarse filter screen, the coarse filter box side wall is provided with fine filter box, the fine filter box inside is provided with fine filter screen, the fine filter box side wall is provided with biological filter box, the biological filter box inside is provided with filler plate, the biological filter box side wall is provided with clean water tank, the coarse filter box side wall is provided with cleaning assembly, the biological filter box inside is provided with mounting assembly;The cleaning assembly includes cleaning plate, and the cleaning plate side wall is attached to the coarse filter screen side wall.In the utility model, the chain sprocket and chain transmission driven by motor are used to move the cleaning plate up and down along the coarse filter screen to scrape off impurities, so as to achieve the effect of automatic cleaning of filter screen and prevention of blockage. The above structure improves the automation maintenance efficiency of the filter device and reduces the labor operation cost.

The application discloses a biofilter and relates to the technical field of sewage treatment, which comprises a filter body, an aeration pipe is fixedly installed at the bottom end of the filter body, a support frame is arranged around the aeration pipe, the support frame comprises vertical rods and horizontal rods which are fixedly connected with each other, the vertical rods are fixedly connected with the filter body, the top end of the horizontal rods is provided with a same biofilter membrane, a liquid outlet cabin is arranged on one side of the filter body, slag prevention pieces are rotatably connected to the two sides of the vertical rods, the slag prevention pieces comprise slag blocking shells and mounting plates which are fixedly connected with each other, gas flows out through the gas passing holes of the slag blocking shells, the slag blocking shells have a certain blocking effect on solid particles in waste gas, a pretreatment cabin and a prefiltering screen for pretreating waste gas are arranged on one side of the filter body, and the waste gas is treated for multiple times, so that the technical problem that solid particles in waste gas easily cause the biofilter membrane to be blocked and affect the filtering effect of the biofilter membrane on waste gas is solved.

The application discloses a kind of green and efficient pig breeding method and system, belong to the technical field of animal husbandry breeding.The method of the application includes four steps of preparation, management in the period of nursing and fattening, processing in the period of leaving and cleaning, resource recycling and facility maintenance.By spraying photocatalysis-microorganism composite functional coating on the surface of pig house, combined with AI visual dynamic precise feeding, source reduction is realized;By using bionic electronic nose and ventilation, deodorization system linkage, process intelligent control is realized;By using electrochemical circulating water washing, waste heat coupling biological filter or shared deodorization container, end efficient purification and small and medium field adaptation are realized;Finally, wastewater and waste material are recycled.The application solves the problems of unstable effect, high energy consumption, low intelligent degree, poor adaptability of small and medium field of existing odor control technology, and has the advantages of source reduction precision, process control in situ, end treatment closed loop, operation intelligence and easy popularization of small and medium field.

The present application relates to water pollution treatment technical field, disclose the present application discloses a kind of V filter tank for sewage treatment, including multiple filter tank main body, water inlet groove, biological filter layer, quartz sand filter material layer, supporting layer, filter plate and water outlet groove are sequentially arranged from top to bottom in each filter tank main body;Biological filter layer includes installation frame and multiple layers of sliding frames arranged in installation frame along horizontal direction, each layer of sliding frame is separated into multiple through slots by partition, biological filler is fixed in through slot, heating wire is arranged in the inside of partition, iron block is arranged on sliding frame, electromagnet and spring are correspondingly arranged on installation frame;When the temperature of water inlet is lower than the set threshold, heating wire is powered to heat, electromagnet is powered to make multiple layers of sliding frames staggered, and the water flow channel is changed from vertical straight path to zigzag path.The present application can quickly improve water temperature and prolong contact time under low temperature condition, guarantee the metabolic activity of denitrifying bacteria, and realize stable denitrification effect.

The utility model discloses a coagulative precipitation and full-automatic filter tank up-down type water purifier which comprises a coagulative precipitation tank body and a biological filter tank body, the coagulative precipitation tank body and the biological filter tank body are stacked, and the coagulative precipitation tank body is positioned below the biological filter tank body; a plurality of first partition plates are arranged in the coagulative precipitation tank body and divide an inner cavity of the coagulative precipitation tank body into a plurality of parts, namely a lifting tank, a mixing tank, a flocculation tank and a precipitation tank; a plurality of second partition plates are arranged in the biological filter tank body and divide the inner cavity of the coagulating sedimentation tank body into a plurality of parts, namely an aerobic biological filter tank, an anoxic biological filter tank and a clear water tank. The device is small in occupied area, low in operation cost and simple and convenient to maintain, and meets the requirements of application scenes such as feed water treatment, sewage regeneration and reuse, river and lake enhanced treatment and industrial wastewater deep treatment.

The utility model relates to biological filter bed technical field especially high -efficient composite biological filter bed's temperature and humidity control structure, including sampling pipe, the end of sampling pipe connects many branch pipes, the branch pipe inserts biological filler area, the bottom of biological filler area sets up bottom support frame, the one side of bottom support frame sets up waste gas air inlet pipe, the top of waste gas air inlet pipe sets up air inlet, the bottom of waste gas air inlet pipe communicates pretreatment area, the bottom of pretreatment area communicates air -guide equal -flow track, air -guide equal -flow track communicates biological filler area, the inner chamber top of biological filler area sets up a plurality of biological filler shower head, this high -efficient composite biological filter bed's temperature and humidity control structure can ensure that microorganism is in the most suitable growth temperature and humidity range, promotes the technology application and management to be more universal.

The application relates to the technical field of glass steel equipment, and relates to a glass steel biological filter deodorization equipment. The deodorization equipment comprises a biological pool and a pre-washing pool. The pre-washing pool is provided with a circulating pipeline, odor gas enters the pre-washing pool through the circulating pipeline, the pre-washing pool is filled with water covering the water inlet position, and a flow guide member for slowing down the gas flow speed is arranged on the inner side of the water inlet end of the pre-washing pool. A wind pipe and a shunt cavity are arranged between the biological pool and the pre-washing pool and are connected in front and back. The input end of the wind pipe is located on the top of the water outlet end of the pre-washing pool. The wind pipe is an n-shaped channel structure. The wind pipe is provided with a first spraying device. The shunt cavity is located at the bottom of the biological pool. The biological pool is provided with a stirrer. The application can help solve the problems of poor gas-liquid mixing effect and easy hardening and difficult maintenance of the biological pool.

The application discloses a vertical subsurface flow and intermittent aeration microbial filter wetland system, which comprises a comprehensive water inlet pipe gallery arranged at the upstream of the wetland, a water outlet pool arranged at the downstream of the wetland and a lower microbial filter arranged between the comprehensive water inlet pipe gallery and the water outlet pool, and the top of the lower microbial filter is provided with an upper subsurface flow wetland structure; the comprehensive water inlet pipe gallery comprises a comprehensive water inlet pool with an opening facing upwards, and a plurality of columnar water inlet holes are formed in the side wall of the comprehensive water inlet pool close to the lower microbial filter; the lower microbial filter is filled with porous medium carrier fillings; the whole wetland system adopts a double-layer cooperative purification design, the lower microbial filter completes the core degradation of organic pollutants, nitrogen and phosphorus in sewage, and the upper subsurface flow wetland structure performs deep purification on residual pollutants, so that the two layers of structures perform their respective functions and cooperatively treat the sewage, and the overall purification effect of the sewage and the pollutant removal rate are greatly improved.

The present application belongs to the technical field of environmental protection, and particularly relates to a high-concentration odor combined treatment device and method for kitchen waste. The odor pretreatment unit of the treatment device comprises an alkali washing tower and an acid washing tower, and the outlet of the alkali washing tower is connected to the inlet of the acid washing tower. The odor biological treatment unit is a combined biological filter tank, which comprises a biological trickling filter section, a pre-washing section and a biological filter section connected in series, and the inlet of the biological trickling filter section is connected to the outlet of the acid washing tower. The odor deep treatment unit comprises a double-mediator barrier low-temperature plasma equipment, a delay oxidation tower and a spraying tower connected in series, and the inlet of the double-mediator barrier low-temperature plasma equipment is connected to the outlet of the biological filter section. The double-mediator barrier low-temperature plasma equipment is used for removing residual refractory odor substances in the gas. The delay oxidation tower is used for prolonging the gas residence time, and the spraying tower is used for the final purification of the gas. The present application can efficiently and accurately remove odor-causing substances, and the treated gas can meet the environmental protection requirements.

The invention relates to an integrated water treatment filter for a recirculating aquaculture system and a filtering method, and belongs to the field of water treatment. The device comprises a biological filtration unit and a physical filtration unit, and is structurally characterized in that the physical filtration unit is located in the biological filtration unit, and the physical filtration unit is located at the upper end of the biological filtration unit; the physical filtering unit is located in the biological filtering unit, and the physical filtering unit is located at the upper end of the biological filtering unit; the physical filtering unit comprises a bead intercepting net, a filtering barrel, a back washing spraying device and floating bead filler, the bead intercepting net is arranged at the top of the filtering barrel, the back washing spraying device is located in the filtering barrel, the floating bead filler is arranged in the filtering barrel, and the back washing spraying device is located in the filtering barrel. The biological filtration unit comprises a barrel body, an aeration device and a high-specific-surface-area filler, the filtration barrel, the aeration device and the high-specific-surface-area filler are all located in the barrel body, and the aeration device is located at the bottom of the barrel body.

An integrated biofilter for a re-circulating aquaculture system is provided. The biofilter may include a moving bed biofilm reactor (MBBR) with biomedia elements configured to support bacteria growth and nitrification of the wastewater and an MBBR output configured to output biomass generated by the bacteria. The biofilter may also comprise a periphyton biofilter configured to introduce oxygen into the wastewater, and a halophyte biofilter comprising a plurality of plants. The halophyte biofilter configured to capture nutrients in the wastewater to generate edible plant mass.

The invention discloses a biological filter tower device for waste gas treatment, and belongs to the technical field of waste gas treatment. A biological filter tower device for waste gas treatment comprises a device body, the device body comprises a filter tower body, a gas inlet cavity, a first filter cavity and a second filter cavity are formed in the filter tower body from bottom to top, the first filter cavity is used for exhaust of waste gas, filler layers are arranged in the first filter cavity and the second filter cavity, and the filler layers are used for filtering the waste gas. Cleaning assemblies are arranged in the filler layers, and each cleaning assembly comprises a stirring piece rotationally arranged in the filter tower body. Through the cooperative arrangement of the cleaning assembly, the water supply assembly and the air supply assembly, compressed air and pressurized water are introduced in the process of stirring the filler layer, dynamic flushing and purging are conducted on the filler in the stirring process, the treatment effect is improved, meanwhile, due to the fact that gas and liquid are flushed into the space between the stirred filler under the pressure effect, the stirring efficiency is improved, and the stirring effect is improved. The collision force of the fillers can be reduced, a buffering effect is achieved, and the possibility of crushing the fillers is avoided.

The utility model relates to a decarburization biological filter which comprises a filter body and an aeration pipeline, and an aerobic filler layer and a hydrolytic acidification filler layer which are layered up and down are arranged in the filter body and are both filled with iron-carbon-based biological carrier filler. Wastewater enters from a water inlet at the bottom of the tank and flows through the hydrolytic acidification layer, iron-carbon filler releases ferrous ions and reducing active substances through a micro-electrolysis reaction in an anaerobic environment, macromolecular organic matters are decomposed into micromolecular fatty acids in cooperation with hydrolytic acidification florae, and water flows into the aerobic layer and flows into the aerobic layer. Aerobic microorganisms attached to the surface of the filler mineralize small-molecular organic matters into carbon dioxide and water under aeration oxygen supply, ferrous ions are oxidized into iron ions and flocculate and adsorb pollutants, hydroxyl radicals generated by micro-electrolysis oxidize refractory substances, the iron ions precipitate and flow back to the lower layer to form circulation, and the pollutants are recycled. A symbiotic reaction system is constructed through electron transfer between filler layers and the synergistic effect of microorganisms, deep coupling of physicochemical and biochemical reactions is achieved, the removal efficiency of refractory pollutants is remarkably improved, and the technological process is simplified.

The utility model discloses a biological filter belongs to sewage treatment technical field, specifically relates to a kind of biological aerated filter, it include: aeration backwash pool, water distribution pool, backwash subassembly and aeration subassembly;Aeration backwash and water distribution pool intercommunication, backwash subassembly and aeration subassembly are installed on aeration backwash and water distribution pool and intercommunication to aeration backwash and water distribution pool in;Backwash subassembly includes: backwash inlet pipe, backwash outlet pipe, backwash inlet pipe;Aeration subassembly includes: aerator, aeration main pipe, aeration inlet pipe, aeration branch pipe and aerator;The utility model is input sewage by setting inlet channel and water distribution channel for two sides aeration backwash pool in water distribution pool, to prevent sewage overflow can, while water distribution pool can be simultaneously for multiple aeration backwash pool water distribution, to greatly improve aeration backwash efficiency, while overflow pipe and overflow pool are set in the side of water distribution pool, can prevent sewage when flowing out when too big, to further improve work efficiency.

The invention discloses a water flowing structure which comprises a floating platform, an ecological filter screen arranged on the floating platform and a suction assembly arranged below the floating platform. The ecological filter screen is composed of a filter screen main body and a cleaning disc rotationally arranged on the bottom surface of the filter screen main body; a screen plate area and a solid plate area are distributed on the bottom surface of the filter screen main body in a staggered manner, and the cleaning disc is provided with bristles for cleaning the bottom surface of the filter screen main body; the suction assembly is composed of a plurality of suction pipes and a water pump connected with the suction pipes and used for sucking water. A driving ring is rotationally arranged on the floating platform located below the suction pipe, the driving ring and the cleaning disc are fixed through a plurality of connecting rods arranged at equal intervals, and a plurality of flow guide holes for rotation driving through water flow falling are formed in the driving ring. According to the invention, the water kinetic energy of the suction assembly is utilized to automatically clear the blockage of the ecological filter screen, so that the lower water conveyed by the suction pipe can effectively pass through a biological filter bed formed by straws, rice husks and the like and water purification plants or algae and then flow back to the water body, and the water activating effect is improved.

The invention provides a rural domestic sewage treatment system of an enhanced biological filter, which sequentially comprises a pretreatment unit, a biological filter unit, a biological filter unit and a sewage treatment unit along the water flow direction, and the pretreatment unit comprises a grating, a regulating tank and a hydrolysis acidification tank; the core biological treatment unit is communicated with a water outlet of the pretreatment unit, and the core biological treatment unit is formed by connecting a multi-stage anaerobic biological filter and a baffling type micro-aeration biological filter in series; and the deep treatment unit is communicated with the water outlet of the core biological treatment unit and comprises an inclined plate sedimentation tank and a cloth filter tank. The invention aims to overcome the defects of the existing rural domestic sewage treatment technology, particularly a centralized treatment technology, in the aspects of coping with complex water quality and cold climate, decentralized management, cost control and the like. The enhanced biological filter sewage treatment system and the enhanced biological filter sewage treatment method provided by the invention can stably operate under various terrain and climate conditions (especially in high and cold areas and high altitude areas), and are high in treatment efficiency and low in construction and operation cost.